Death By Revolver Level 18 value jump unnatural

Sorry to intrude on this conversation, but I found this odd as well; so I checked around on other sites. According to [http://dnf.wikiwiki.jp/?%A5%AC%A5%F3%A5%CA%A1%BC%28%C3%CB%29%2F%A5%EC%A5%F3%A5%B8%A5%E3%A1%BC Arad Senki]: the Lv18 values are different. I'm pretty sure it has something to do with the Standard Procedure Chronicle gear's +10% critical damage modifier. Note that Chronicle gear bonus effects only apply while the player is in '''dungeon/training area'''. This also applies to tainted/cracked chronicle effects. (Epics, Legendaries and Uniques as well, I believe). Looking at skills outside of town tends to skew values. 

As far as I know, most Percentage Bonuses apply multiplicatively to the base value. Even if your source has 77% base critical damage modifier, the +10% from Standard Procedure is still not enough to reach 92% (even if it were applied additively). Your source must have other equips increasing DBR's crit damage as well from his weapon, sub equip, magic stone, or tainted/cracked chron gear.